Rotary cutter.



E. KENNY.

ROTARY GUTTER. n APPLIGATION HL'ED JAN. 22, 1913.

1, 1 1 1,7 5 1 A Patented Sept. 29, 1914 2 SHEETS-SHEBT-Z.

. specification.' i I This invention "relates to rotary cuttersy '10 UNITED STATES. rArnNT oFFicE.

`unMoNn KENNY, orl Nnw BRIGHTON, NEW YORR, essreNoR To MERCNTILR Conro- RATION, or New Your, N. Y., A CORPORATION or New YORK.

ROTARY oiiTTER.

t Specication of Letters Patent. Patented Sept, 29, 1914.

.Application filed January 22, 1913. Serial No, 743,472.

To all 'whom 't may concern# Be it known that I, EDMOND KENNY, a

.citizen of the United States, and a resident of New Brighton, in the county of Richmond and State of New` `Yorlnhave invented certain new and useful Improvements in Rotary Gutters, of which thev following is a and'particularlyto that# class thereof provided for cutting portions from sheets or webs, as'of paper or the like'. Suchcutters kare commonly operated in coactionrwithia rotary (,iylindricaly vvanvil, between'which and'I thecutte'r, the sheetor web is passed.

'The object of my improvements is to provide ,a cutter ofthe Vclass specified, having cutting memberswhich may be readily adcutter.

justed relatively to each 'other and which cutting members 'may be readily removed for sharpening or for replacing by others.

To, these ends my improvements comprise Vfeatures illustrated in their preferred embodiment in the drawingsa'ccom-'panying this specification whereinv v l l' Figure 1 -is a perspective view of my `improved cutter. Fig. 2 is 'a plan view of a web illustrating one'form of product of said Fig 3 is a'plan view of the body memberl of my improvedfcutt'er. Fig. 4 is aside elevation thereof. Fig. 5 is an end viewcorresponding therewith. Fig, 6 is a cross-sectional view on line .6, 6 of Fig. 5, looking in the direction of the arrow. Figs.-7,"v8 and'9 are respectively a plan view, endelevation fand side elevation of one of A the cutting members. FigslO, l1 and 12 are similar views l'respectively of another cut' ting member. Figs. 4 to 12 inclusive are to oneiscale, Fig. l is to agreater scale and Figs. 2\,and 3 tov Smaller scales than said Figa/.1. t0 12. Y e

eforedescribing the invention in detail I desire to have it understood that the invention is' lnot limited to the particular construction' and arrangement of parts which I have illustrated and shall hereinafter delscribe,and that various changes may be made inthe mechanism 'shown without departingfrom the spirit or scope of the invention, and that the phraseology which I employ is for the purpose-of description and not of. limitation.

I have chosen to illustrate my improvements as applied to a rotary cutter particularly adapted for cutting successive window openings in a y\web, said openings being skewed relatively to the lengthwise edge of 'said web, and which web is designedto be afterward severed diagonally into 'diamond shaped blanks, to be thereafter folded into envelops Iwhereinl said openings .lie parallel with the longitudinal edges respectively of said envelops. l

To causey the straight portions of the cutting edges of the'outting members to lie at the chosen angle to the cutter aXisin conformity Awith the surface of a Acylinder and at the 'Sametime to cause contiguous straight portions of the cutting members to meet or overlap in planes respectively normal to a planethrou'gh the axis of the rotary cutter requires a peculiar coarrangement of the cutting member seats in said body member, the

relation of said seats being inter-dependent,

. a change in the angularity of those portions of the cutting edges lying in planes, relatively to the cutter axis, requiring corre-A sponding changes in the seats. I y

. My lmproved cutter comprises body 2 which may be of general cylindrical'form,f

having ani axialA hole 3- therethrough for mountin on the usual shaft `not shown. Said body 2 is illustrated as arranged for two diametrally opposite sets of cuttingmembers so that at each complete rotation of the cutter two consecutive openings 10 are cut in the sheet or web. It will be obvious however that said cutter might equally well be provided with only one set of cutting members or with more than two sets. the specific purpose illustrated herein I prefer to. provide four members 1n each set,`

comprising two pairs, each having two like members. One pair consists of two members 4, 5 each having a U shaped cutting edge including two parallel portions as 7, 8

.curved in conformity with the surface of a cylinder Aand lying in parallel planes,so that when mounted on body 2 saidA cutting edges4 will rotate ata constant distance from the cutter axis. Furthermore said cutting members' 4, 5 are mounted on said body so' as to bring the planes of the parallel portions 7, 8 into oblique relation to the cutter axis and normal to a pla-ne through said axis. Also vFor "surface of the same cylinder to which the.

cutting edges of the U shaped cutting mem-A bers conform, and said cutting edge 9 lies in the same plane, oblique to the cutter axis, as that in which' edge 7 of cutting member 4 l and edge 13 of cutting member 5 lie.

Edge 15 of cutting member 12 bears the same relation to edges 8 and 14 as that just descrlbed rela-tively to edges 9, 7 and 13.

By this arrangementcutting edges 9 and 15 provide a continuation -of the cutting edges of members v4, 5 from one member t0 the other thereof. This arrangement of cutting members requires that peculiar corresponding arrangement of cutting member seats which I will now describe.

Cutting members 11 and 12 may be conveniently mounted on seats 16, 17 preferably lying in one plane and parallel with the cutter axis. Cutting members 4 and 5 however,`

are preferably formed with fiat backs, as 18 to cutting member 4, and with parallel sides 19, 20, respectively, normal to said back 18. The seats 21 and 22 for thesecutting members are arranged obliquely relatively to the cutter axis and said seats are each normaLto a common plane, indicatedby line 25, 25` in Fig. 3, which plane is oblique to the cutter axis and normal to a plane indicated by line 26, 26 in Fig. 4 and line 27, 27 iny Fig. 5 through the cutter axis. Also if body 2 is of 'suiiicient sizesaid seats 21, and 22 may each be provided with oeor two side walls, as 23 to seat 21, normal to said seat.` Also as said wall 23 is normal to seat 21 it is also normal to plane 26, 26. It will also be observed that oblique seats 21, 22 are arranged symmetrically relatively to the' plane of seats 16, 17 whereby all four cutting meinbers 4, 5, 11 and 12 are symmetrically disposed. Said cutting members may be secured to their respective seats by dowels as 24 and. screws as 28. It will be noted that the longitudinal edges of cutting members 4, 5 and'll, 12 will obviously cut vlines of ogee form, closely Aapproximating straight lines. Also by slightly modifying those cutting edges by stoning, even closerapproximation to straight lines may be had. Also it will be apparent that the larger the diameter of the cylinder in which the cutting edges lie the closer will be the approximationto straight lines in the longitudinal portions of the resulting cuts. By the foregoing described arrangement I provide Aa `rotary cutter for the purpose the cutter axis, and

specified, in which the members maybe to the cutter axis, and a cutting member,

having fiatparallel side walls, iixed to said seat, said side walls being normal to a plane through the cutter axis.

2. A rotary cutter including in combination a body, having a cutting member seat out'of parallelism with'the cutter axis and normal to a plane oblique to said axis, said plane being normal to a plane through said axis, and a cutting member iixedto Said seat.

A rotary cutter including in combination a body, hav-ing two cutting member seats which are inclined to one another and 4out of parallelism with the cutter axisand normal tov a.' common plane and which coinmon plane is obliqueto the cutter axis and normal to a plane through said axis, and a cutting member fixed to eachiseat.

'4. A rotary cutter including in combination a body, having a .plurality of cutting member seats, one or more of which are "parallel with the cutter axis-and tivo of which are oblique to said axis, `said oblique seats each havingr a. side wall normal thereto respectively and normal to a plane through a 'cutting 'member -fixed to eah seat. f v

5. A rotary cutter 'including in combination a body, having four flat cutting-meniber seats, two of which arein one plane.

parallel with the cutterl axis and-two ofr 'which are oblique to said axis, said oblique seats being normal to a common plane and which common plane is oblique to the cutter axis and normal to a plane through said axis, and, a cutting 'member-'fixed 'to each seat. l

6. A rotary cutter including in Acombination a body, having four fiat cutting-member seats, two of which are in one plane,par

' allel with the cutter axis4 and two of which are oblique to said axis, said oblique seats being normal to a common plane and which common plane isoblique to the cutter axis and normal to 'a-plane throqgh said axis, 'said oblique seats being arranged symmetrically relatively' to the plane of said first two seats, and a cutting member fixed to each seat. l

7. A rotary cutter including in combination a cuttingmember having a U shaped edge in conformity with the surface of a cylinder including. two parallel "portions lying in planes respectively oblique-to the cutter axis and normal to a plane through said axis, a second cutting member having an edge in conformity with the surface of said cylinder, said edge lying in a plane having the-same obliquity to the cutter axis l as the planes of the parallel portions of the U-shaped cutting member and'being so disposed relatively to said U-shaped cutting member as to provide a continuation of one of the parallel portions of the cutting edge of said U shaped cutting member.

' 8. A rotary cutter including vin combination a pair ofoppositely disposed cuttingv 1o memberseach having a U-shaped cutting edge including two parallel portions lying inplanes respectively oblique to the cutter ax1s and normal to 'a plane through said axis, said cutting edges being in conformity with the surface of a cylinder, 'said parallel portions of the cutting edge of 'one cutting member being adjacently opposed to 'the lsimilar portions respectively of the edge of the other cutting member; a third cutting member having an edge in conformity with the surface of said cylinder Aand. disposed in a plane at the same oblique angle to the cutter axis as the planes of the parallel portions of said U shaped cutting members, the

edge of said third cutting member being so disposed relatively'to said U-shaped 'cutting members as to provide a continuation from one of the parallel portions of one of the cutting edges of one U-shaped cutter R0 to the adjacent parallel `portion of the 'cutting edge of the opposite U shaped cutter.

9. A rotary cutter including in combination a body, havin four u'ttingmember flat seats, two of w ich are in one plane,

fparallel with the cutter axis and` two of which are oblique to said axis, said oblique yseats each being normal to a common plane and which common plane is oblique vto, the cutter axis and normal to a plane through said axis, said oblique-seats being arranged symmetrically relatively to the'plane of said first two seats, there being mounted on said oblique seats respectively a pair of oppositely disposed cutting members, each having. a U shaped cutting edge including two parallel portions lying in planes respectively parallel to the above mentioned common.

plane, said cutting edgesbeing in conformity with the surface of a cylinder, said parallel portions -of the cutting edge of one cutting member being adjacently opposed to the similar portions respectively of the edge'l of the other cuttingmember; a second pair of oppositely disposed cutting i members mounted on'said first two seats parallel with the cutter axis, each of said cutting members having an edge in conformity with the surface of 'said cylinder and disposed in a plane at the same oblique angle to the cutter axis as .the planes of the parallel portions of said U 'shaped cutting members, the 4edges respectivel of said second pair of cuttingfmemb'ers eing so disposed-relatively 'to said` U-shaped cutting members respectively as to provide a continuation of the parallel portionsof the cuting witnesses.

' EDMND KENNY. Witnesses:

WILBUR M. S'rornt,i J. S. CAMPBELL. 

